When doing online research for school, Wikipedia is not a reliable source of primary (or secondary, or tertiary) information. While the citations at the bottom of a Wikipedia entry can point you toward useful information, you should NOT cite Wikipedia as a source. Why? Here are a few reasons...
Student hoaxes world's media on Wikipedia
Actual screen shot of incorrect info on Wikipedia
Wikipedia Gamergate scandal: How a bad source made Wikipedia wrong about itself
How I accidentally started a Wikipedia hoax about Amelia Bedelia
After a half-decade, massive Wikipedia hoax finally exposed